EP0745059B1 - Wasserreinigungsvorrichtung - Google Patents
Wasserreinigungsvorrichtung Download PDFInfo
- Publication number
- EP0745059B1 EP0745059B1 EP95930078A EP95930078A EP0745059B1 EP 0745059 B1 EP0745059 B1 EP 0745059B1 EP 95930078 A EP95930078 A EP 95930078A EP 95930078 A EP95930078 A EP 95930078A EP 0745059 B1 EP0745059 B1 EP 0745059B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- radon
- pump
- reactor tank
- purifying apparatus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0005—Degasification of liquids with one or more auxiliary substances
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/04—Treating liquids
- G21F9/06—Processing
Definitions
- This invention relates to a water-purifying apparatus, which is especially adapted to reduce the radon content of radon-contaminated water and which comprises a reactor tank for treating the radon-contaminated water, a radon-releasing means arranged in the reactor tank to receive and treat water from a first pump adapted to supply water from a source of water containing radon-contaminated water, the water from the radon-releasing means accumulating in the reactor tank, an inlet duct extending between the first pump and the radon-releasing means, an outlet duct from the reactor tank, said outlet duct being connected to a water consumption system, and a radon-gas outlet from the reactor tank.
- US-4,371,383 teaches a radon-removal system intended to be arranged between a source of water and a pressure storage tank. According to the US specification, this system succeeds in removing 80-90% of the radon by aerating the water, but nevertheless does not possess the efficiency required to achieve results below the Swedish maximum permissible value of 500 Bq/l, if the contaminated water has a radon content of 5000 Bq/l or more.
- SE 464,712 discloses a water-purifying apparatus which effectively removes, inter alia, iron and manganese from water.
- the Swedish technique is based on effective aeration of the water, a technique that has proved to be useful also when it comes to removing radon.
- radon-contaminated wells are often fairly deep (70-100 m), which means that the amount of water lifted is rather small, for instance 5 l/min.
- a much greater flow rate of at least 25 l/min is required for effective aeration of the water. When the flow rate is too small, the aeration is less effective, which of course has an adverse effect on the removal of radon.
- the main object of this invention is to obviate the inconveniences of the prior-art radon-removal system by providing a water-purifying apparatus for separating radon from water, which is equally effective regardless of the amount of water supplied by the well pump.
- Another object of the invention is to provide a water-purifying apparatus that does not take up much space and is easy to set up.
- the water-purifying apparatus according to the invention has the advantage of being inexpensive to set up. Since it can be adapted to all types of wells as well as to the amount of water supplied from each well, the water-purifying apparatus can be set up between an existing pump and the pressure storage tank normally provided. Neither the pump nor any other equipment need be exchanged.
- Fig. 1 shows a water-purifying apparatus or radon-separating apparatus according to the invention.
- This radon-separating apparatus comprises a reactor tank 1, the construction of which will be described in more detail below.
- a radon-releasing means 2 is mounted in the reactor tank.
- An inlet duct 4 extends between a well containing radon-contaminated water and the radon-releasing means.
- a well pump 3 is connected in the inlet duct, and a combined circulation/outlet pump 10 is arranged in the tank and connected to the inlet duct by means of a duct 5, a solenoid valve 8 which is closed in the absence of current, and a T-joint 11.
- the first pump or well pump 3 is a 380-V pump
- the second pump 10 is a 220-V submersible drainage pump having a capacity of approximately 150 l/min.
- the duct 5 is equipped with a non-return valve 15 preventing radon-contaminated water from being, by the well pump 3, pressed directly into the reactor tank via the pump 10.
- the duct 4 is equipped with a non-return valve 12 preventing water from flowing backwards therein towards the pump 3.
- the pumps 3 and 10 are so dimensioned that the pump 3 provides a higher pressure than does the pump 10, thus ensuring that the water from the well is at all times supplied to the radon-releasing means.
- the pump 10 is connected to a pressure storage tank for receiving radon-free water from the reactor tank via a duct 6, which is connected to the duct 5 between the solenoid valve 8 and the non-return valve 15 and which has a non-return valve 22 and a solenoid valve 21, which is open in the absence of current.
- a pressure switch 31 is connected to the duct 6 and adapted to sense the pressure in the pressure storage tank.
- the radon-releasing means 2 comprises a water pipe 32, which is connected to the inlet duct 4 and extends into the reactor tank 1, thus opening into a treatment container 33.
- the treatment container is open upwards, and its opening is covered by a pair of loose plates 38.
- An air suction pipe 34 which is provided inside the water pipe, has a first end, which is in communication with the surrounding atmosphere outside the reactor tank, and a second, conically widened end 35, which is located in the water pipe 32. The widened end is at all times located above the highest possible water level in the tank 1. Between the inner wall of the water pipe and the conical end 35 is formed a narrow, annular gap 36, through which the water flows.
- the velocity of the water increases when it passes through the annular gap 36 and disintegrates to droplets, which are mixed with the air flowing in through the air suction pipe 34.
- the air is sucked in via a vacuum valve 7 provided at the first end of the air suction pipe.
- This valve 7 prevents the radon gas from flowing back out through the air suction pipe 34.
- the mixture is caused to flow down to the bottom of the treatment container 33 and between the wall of this container and the water pipe, so as to impinge upon the plates 38.
- the treated water flows out of the treatment container "in the shape of an umbrella".
- the radon found in the water can be effectively converted to radon gas, which is withdrawn from the reactor tank via an outlet 9, which consists of a tube extending to the closest outer wall of the compartment in which the radon-separating apparatus is arranged.
- an outlet 9 which consists of a tube extending to the closest outer wall of the compartment in which the radon-separating apparatus is arranged.
- a valve 24 arranged in the wall.
- a fan 23 is set up in the valve, in order to ensure that the radon gas is fed out of the reactor tank. Even without the fan, the radon gas will, as a rule, be withdrawn from the reactor tank owing to the positive pressure created when the radon is released. It should be pointed out that the reactor tank has approximately atmospheric pressure.
- Fig. 1 shows a case where the water level in the reactor tank is located between two level sensors 28 and 29 which, via electric lines f and e, respectively, are connected to a level-sensor relay 30 on a control panel 25.
- the control panel 25 comprises a contactor 26 and a time lag relay 20, which are controlled by the level-sensor relay.
- the solenoid valves 8 and 21 as well as the fan 23 are connected to the time lag relay by means of connecting lines b, c and d, respectively.
- the well pump 3 is connected to the contactor by means of a line a.
- the pump 10 is actuated with the aid of the control panel 25 via a line g, in which the pressure switch 31 is electrically connected, and a line i or from the level-sensor relay 20 via a line h and the line i.
- the pump 10 Being arranged at the bottom of the tank, the pump 10 will draw up any sludge, such as iron and manganese, that has been precipitated upon the aeration in the radon-releasing means 2.
- the water-purifying apparatus according to the invention operates as follows.
- the reactor tank 1 is made up of a plastic tube 16, which is cut to suitable length, depending on the aimed-at reactor tank volume.
- a bottom lid 18 is glued to the bottom end of the tube, and threaded holes are made in the top lid 17 for the water duct 5, the water pipe 32, the level sensors 28 and 29 and the radon-gas outlet 9.
- the top lid can be glued to the tube, but it may be convenient to dispense with the gluing, thus enabling the reactor tank to be opened for service purposes.
- Fig. 3 illustrates a second embodiment of the radon-separating apparatus according to the invention.
- the radon-separating apparatus thus comprises a reactor tank 1, in the upper part of which is mounted a radon-releasing means 2.
- An inlet duct 4, 55, 56 extends from a well containing radon-contaminated water to the radon-releasing means.
- the first pump or well pump 3 is connected in the inlet duct
- the second pump 10 is connected in the inlet duct between the well pump 3 and the radon-releasing means 2.
- the inlet-duct portion 4 partly extends into the reactor tank. Between the duct portions 4 and 55, the T-joint 11 is connected via its connections 52 and 53.
- connection 53 is connected to the suction side of the pump 10, while the connection 52 is connected to the delivery side of the pump 3.
- the T-joint is disposed inside the reactor tank on a level which at all times is located below the water level when the radon-separating apparatus is in operation.
- the third connection 54 is provided with a non-return valve 57, enabling water to be drawn from the reactor tank into the duct portion 55, but preventing radon-contaminated water from being pressed directly into the reactor tank via the connection 54 by means of the well pump 3. It should be emphasised that the entire inlet duct can be arranged outside the reactor tank, in which case only the connection 54 is inserted in the tank.
- An outlet duct 58 is connected to the bottom part of the reactor tank, and a 220-V pump 59 is connected in the outlet duct.
- the delivery side of the pump is preferably connected to a pressure storage tank, where radon-free water is collected for future consumption.
- the pump 59 is controlled by a pressure switch 31 which, at a predetermined lower pressure on the delivery side of the pump, allows current to be fed to the motor of the pump and which, at a predetermined higher pressure, interrupts the current being fed.
- a non-return valve 22 is connected in the outlet duct 58 between the pump 59 and the reactor tank 1.
- the radon-separating apparatus illustrated in Fig. 3 operates as follows. It is assumed that the reactor tank 1 is filled to the level indicated in Fig. 1. When the pressure in the pressure storage tank and, hence, the pressure on the delivery side of the pump 59 have sunk to a predetermined level, the pressure switch 31 allows the pump 59 to be actuated. The pump 59 then draws water from the reactor tank 1 in order to replenish the pressure storage tank. When the water level in the reactor tank has sunk below the level sensor 29, the level-sensor relay 30 will transmit a signal to the main contactor 26 in order to actuate the pump 3 and, via an auxiliary contactor 27, actuate the fan 23 and the pump 10.
- the pump 10 draws water from the duct portion 55 and presses this water into the radon-releasing means 2.
- the pump 10 always draws about 25 l/min and, since the pump 3 normally does not deliver such amounts of water, the pump 10 draws the remainder from the reactor tank via the non-return valve 57. Thus, the pump always presses about 25 l/min through the duct portion 6 into the radon-releasing means 2.
- the level-sensor relay 30 will deactivate the pumps 3 and 10 as well as the fan 23 via the main contactor 26 and the auxiliary contactor 27.
- a time lag relay 20 is set at a time lag period, the pump 10 and the fan 23 will remain active during this period, so as to circulate the water in the reactor tank and draw any additional released radon gas therefrom.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- High Energy & Nuclear Physics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Physics & Mathematics (AREA)
- Water Supply & Treatment (AREA)
- General Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Devices For Medical Bathing And Washing (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Water Treatment By Sorption (AREA)
Claims (9)
- Wasserreinigungsvorrichtung, die insbesondere angepaßt ist, um den Radongehalt radon-kontaminierten Wassers zu verringern, und die einen Reaktortank (1) zur Behandlung des radon-kontaminierten Wassers, ein Radon-Freisetzungsmittel (2), das in dem Reaktortank angeordnet ist, um Wasser von einer ersten Pumpe (3) zu empfangen und zu behandeln, die angepaßt ist, um Wasser von einer radon-kontaminiertes Wasser enthaltenden Wasserquelle zuzuführen, wobei sich das von dem Radon-Freisetzungsmittel kommende Wasser in dem Reaktortank sammelt, eine Einlaßleitung (4), die sich zwischen der ersten Pumpe und dem Radon-Freisetzungsmittel erstreckt, eine Auslaßleitung (6) von dem Reaktortank, wobei die Auslaßleitung an ein Wasser-Verbrauchssystem angeschlossen ist und einen Radongas-Auslaß (9) von dem Reaktortank aufweist, dadurch gekennzeichnet, daß ein Vermischungsmittel (11) vorgesehen ist, in welchem Wasser von der ersten Pumpe (3) mit Wasser von dem Reaktortank (1) mit Hilfe einer zweiten Pumpe (10) gemischt wird, um eine solche Wasserströmung in dem Radon-Freisetzungsmittel hervorzurufen, die in einer wirksamen Radon-Freisetzung resuliert, wobei die zweite Pumpe mit der Auslaßleitung (6) verbunden ist, und daß das Radon-Freisetzungsmittel (2) in einer Verbindung (7, 34) mit Luft in der Umgebung des Reaktortanks derart steht, daß Luft über die Verbindung mit Luft mit dem Wasser mitgerissen wird, welches über das Vermischungsmittel dem Radon-Freisetzungsmittel im Hinblick auf ein Zumischen von Luft zu dem Wasser und, somit, Freisetzen des Radons zugeführt wird.
- Wasserreinigungsvorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, daß das Vermischungsmittel eine T-Verbindung (11) ist.
- Wasserreinigungsvorrichtung gemäß irgendeinem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß sich die zweite Pumpe (10) innerhalb des Reaktortanks (1) befindet.
- Wasserreinigungsvorrichtung gemäß irgendeinem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die zweite Pumpe (10) angeordnet ist, um Wasser nahe bei dem Boden des Reaktortanks (1) zu ziehen, um beliebige feste Teilchen zu entfernen, die sich bei der Behandlung in dem Radon-Freisetzungsmittel abgesetzt haben.
- Wasserreinigungsvorrichtung gemäß irgendeinem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß Ventilmittel (8, 21) angeordnet sind, um die Strömung von der zweiten Pumpe wechselweise zu dem Vermischungsmittel (11) und zu dem Wasserverbrauchssystem zu leiten.
- Wasserreinigungsvorrichtung gemäß Anspruch 5, dadurch gekennzeichnet, daß ein erstes Ventilmittel (8) in einer Leitung (5) angeordnet ist, die sich zwischen der zweiten Pumpe (10) und dem Vermischungsmittel (11) erstreckt, und daß ein zweites Ventilmittel (21) in der Auslaßleitung (6) angeordnet ist.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9402780A SE502010C2 (sv) | 1994-08-19 | 1994-08-19 | Anordning för vattenrening |
SE9402780 | 1994-08-19 | ||
SE9403643 | 1994-10-24 | ||
SE9403643A SE502672C2 (sv) | 1994-10-24 | 1994-10-24 | Vattenrenare |
PCT/SE1995/000940 WO1996006044A1 (en) | 1994-08-19 | 1995-08-18 | Water-purifying apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0745059A1 EP0745059A1 (de) | 1996-12-04 |
EP0745059B1 true EP0745059B1 (de) | 1998-04-22 |
Family
ID=26662121
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95930078A Expired - Lifetime EP0745059B1 (de) | 1994-08-19 | 1995-08-18 | Wasserreinigungsvorrichtung |
Country Status (6)
Country | Link |
---|---|
US (1) | US5858071A (de) |
EP (1) | EP0745059B1 (de) |
AT (1) | ATE165313T1 (de) |
AU (1) | AU3358195A (de) |
DE (1) | DE69502184T2 (de) |
WO (1) | WO1996006044A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2798771B1 (fr) * | 1999-09-17 | 2008-03-07 | Jean Pronost | Dispositif visant a reduire les gaz radioactifs ou nocifs dans l'eau |
US6287369B1 (en) * | 2000-03-30 | 2001-09-11 | David W. Osmond | Low pressure radon stripper for wells |
US7806960B2 (en) * | 2007-05-07 | 2010-10-05 | Raymond Leroy Frosti | Fluid treatment device |
KR100911416B1 (ko) * | 2009-05-07 | 2009-08-11 | 한국지질자원연구원 | 지하수 라돈 저감장치 |
CN110043994B (zh) * | 2019-04-08 | 2024-01-05 | 广东美的暖通设备有限公司 | 空气处理设备的水箱组件、空气处理设备及其控制方法 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1592647A (en) * | 1920-06-12 | 1926-07-13 | Frank N Speller | Method and means for deactivation of water |
GB550998A (en) * | 1941-08-01 | 1943-02-03 | George Arrowsmith | Improvements in and relating to boiler feedwater deaerators of the spray or the like |
US3940471A (en) * | 1973-05-18 | 1976-02-24 | Phillips Petroleum Company | Removal of radon from hydrocarbon streams |
US4023941A (en) * | 1974-04-22 | 1977-05-17 | The British Hydromechanics Research Association | Gas desorption from liquids |
US4371383A (en) * | 1981-01-12 | 1983-02-01 | Rost K Lennart | Radon removal system |
US4582610A (en) * | 1985-09-03 | 1986-04-15 | Martin Baker | Well water aeration system |
US4756724A (en) * | 1986-12-03 | 1988-07-12 | Yuill Grenville K | Extracting radon gases from a domestic water supply |
US5045215A (en) * | 1987-07-13 | 1991-09-03 | North East Environmental Products, Inc. | Removing hazardous contaminants from water |
US4799035A (en) * | 1987-11-06 | 1989-01-17 | Allied-Signal Inc. | Microwave diode tuning circuit |
CA2000037A1 (en) * | 1988-10-14 | 1990-04-14 | Bruce L. Lamarre | Removing hazardous contaminants from water |
US5100555A (en) * | 1990-06-15 | 1992-03-31 | Matson Stephen L | Method and system for removing radon from radon containing water |
US5104554A (en) * | 1990-12-14 | 1992-04-14 | Aqua-Rid, Inc. | Removing radon by downhole sparging of air |
US5279746A (en) * | 1992-06-05 | 1994-01-18 | Daniel Ziol | Process and apparatus for removing radon from water |
US5614086A (en) * | 1995-06-05 | 1997-03-25 | Hill; David D. | Method and apparatus for removing contaminants from a water supply |
US5660721A (en) * | 1995-08-02 | 1997-08-26 | E-Group, L.L.C. | Apparatus for treatment of well water provided through a well water supply line |
-
1995
- 1995-08-18 AU AU33581/95A patent/AU3358195A/en not_active Abandoned
- 1995-08-18 AT AT95930078T patent/ATE165313T1/de not_active IP Right Cessation
- 1995-08-18 DE DE69502184T patent/DE69502184T2/de not_active Expired - Fee Related
- 1995-08-18 US US08/750,941 patent/US5858071A/en not_active Expired - Fee Related
- 1995-08-18 EP EP95930078A patent/EP0745059B1/de not_active Expired - Lifetime
- 1995-08-18 WO PCT/SE1995/000940 patent/WO1996006044A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
AMERICAN WATER WORKS ASSOCIATION JOURNAL, Volume 79, No. 4, 1987, JERRY D. LOWRY et al., "Point-of-Entry Removal of Radon from Drinking Water", page 162 - page 169, see page 163 and figure 1. * |
Also Published As
Publication number | Publication date |
---|---|
US5858071A (en) | 1999-01-12 |
DE69502184T2 (de) | 1998-10-08 |
AU3358195A (en) | 1996-03-14 |
WO1996006044A1 (en) | 1996-02-29 |
DE69502184D1 (de) | 1998-05-28 |
EP0745059A1 (de) | 1996-12-04 |
ATE165313T1 (de) | 1998-05-15 |
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